Ambient Radiation for Thermometers
In the infrared detection of outdoor power equipment, the infrared radiation received by the detection instrument includes not only the radiation emitted by the corresponding part of the tested equipment itself, but also the reflection from other parts of the equipment and the background, as well as direct incoming solar radiation. These radiations will interfere with the temperature of the part of the device to be tested, and cause errors in fault detection. In order to reduce the impact of the environment and background radiation, the following countermeasures should be taken: The on-site infrared detection of outdoor electrical equipment should be carried out on cloudy days or in the evening around sunset when there is no light. In this way, direct incident, reflected and scattered solar radiation can be prevented. For indoor equipment, lighting can be turned off, and other radiation effects can be avoided.
For highly reflective equipment surfaces, appropriate measures should be taken to reduce the impact on solar radiation and radiation from surrounding high-temperature objects. Or change the detection angle to find the best angle to avoid reflection for detection.
In order to reduce the radiation influence of solar radiation and the surrounding high temperature background, appropriate shielding measures can be taken during detection, or an appropriate infrared filter can be installed on the infrared thermal imaging instrument to filter out the sun and other background radiation.
Select an instrument with appropriate parameters and a detection distance for detection, so that the detected equipment part fills the field of view of the instrument, thereby reducing the interference of background radiation.
